Why it's high time we stopped anthropomorphising ants We have long drawn parallels between ants and humans. Now we are comparing the insects to computers. Pollution is making many cities unlivable for their human inhabitants, but it is also tearing ant families and communities apart. Ants recognise each other by sniffing a thin layer of hydrocarbons on the outside of their exoskeletons; each colony has a specific "smell". But a new study reveals that ozone emissions can change the structure of these hydrocarbons.

PCWorld executive editor Gordon Mah Ung, a tireless journalist we once described as a founding father of hardcore tech journalism, passed away over the weekend after a hard-fought battle with pancreatic cancer. Gordon was 58, and leaves behind a loving wife, two children, older sister, and mother. With more than 25 years' experience covering computer tech broadly and computer chips specifically, Gordon's dogged reporting, one-of-a-kind personality, and commitment to journalistic standards touched many, many lives. He will be profoundly missed by co-workers, industry sources, and the PC enthusiasts who read his words and followed him as a video creator. Gordon studied journalism at San Francisco State University and then worked as a police reporter for the Contra Costa Times in the late 1990s. In 1997, he joined Computerworld (a PCWorld sister publication) before I recruited him to join boot magazine (later re-launched as Maximum PC), where he would ultimately lead hardware coverage for 16 years. At Maximum PC, Gordon developed his trademark voice that blended a hardcore passion for PC tech with non-sequiturs, deadpan humor, and occasional bursts of outrage.

A quick look at census data (more than 11,000 people turn 65 each day in the U.S.), along with my own rough calculations, suggest that several hundred people are turning 70 each day in the great state of California, and every 10 minutes or so, one or more of them email me about their license renewal adventures with the DMV. I get the usual, always entertaining horror stories about testing: ("They put in ridiculous questions that do not pertain to driving," said 75-year-old Dahana Klerer of Newport Beach, who flunked twice and added, "I'm not a stupid person but they make you feel really stupid.") California is about to be hit by an aging population wave, and Steve Lopez is riding it. His column focuses on the blessings and burdens of advancing age -- and how some folks are challenging the stigma associated with older adults. "I had no problem," said 79-year-old Ruth Gleason of Ridgecrest, who added: "Thank you and Steve Gordon at the DMV for working to alleviate the test-taking fears for over-70 CA drivers."

A class-action lawsuit filed in a US federal court last Valentine's Day accuses Match Group – the owners of Tinder, Hinge and OkCupid dating apps, among others – of using a "predatory business model" and of doing everything in its power to keep users hooked, in flagrant opposition to Hinge's claim that it is "designed to be deleted". The lawsuit crystallised an ocean of dissatisfaction with the apps, and stimulated a new round of debate over their potential to harm mental health, but for scientists who study romantic relationships it sidestepped the central issue: do they work? Does using the apps increase your chances of finding your soulmate, or not? The answer is, nobody knows. "The science isn't there," says sociologist Elizabeth Bruch of the University of Michigan, who has studied online dating for a decade.

Recently there has been substantial interest in spectral methods for learning dynamical systems. These methods are popular since they often offer a good tradeoff between computational and statistical efficiency. Unfortunately, they can be difficult to use and extend in practice: e.g., they can make it difficult to incorporate prior information such as sparsity or structure.

I described a 1999 result by Koutsoupias and Papadimitriou, regarding multi-agent systems. They studied systems in which non-cooperative agents share a common resource and proposed the ratio between the worst possible Nash equilibrium and the social optimum as a measure of the effectiveness of the system. This ratio has become known as the "Price of Anarchy," as it measures how far from optimal such non-cooperative systems can be. They showed that the price of anarchy could be arbitrarily high, depending on the complexity of the system. The Price-of-Anarchy concept has later been extended to other types of equilibria--for example, Pareto-Optimal Equilibria.b

When it comes to the California DMV, is this a case of brand new year, same old tune? It's a positive sign that the massive bureaucracy's director has been checking out reader complaints about the license renewal process for drivers after age 70, and here's a news bulletin: He's even tossing out some of the crazy test questions that many of you have been griping about. I'll get to that in a moment, but first let's dip into the mail bag, which continues to overflow with tales from the Department of Motor Vehicles. Dave Warburton, 76, of Santa Clarita went to renew his license the first week of January and was told there was no record of his pre-registration in the computer system. "Not off to a good start," he wrote in an email.

Human interactions are deeply rooted in the interplay of thoughts, beliefs, and desires made possible by Theory of Mind (ToM): our cognitive ability to understand the mental states of ourselves and others. Although ToM may come naturally to us, emulating it presents a challenge to even the most advanced Large Language Models (LLMs). Recent improvements to LLMs' reasoning capabilities from simple yet effective prompting techniques such as Chain-of-Thought have seen limited applicability to ToM. In this paper, we turn to the prominent cognitive science theory "Simulation Theory" to bridge this gap. We introduce SimToM, a novel two-stage prompting framework inspired by Simulation Theory's notion of perspective-taking. To implement this idea on current ToM benchmarks, SimToM first filters context based on what the character in question knows before answering a question about their mental state. Our approach, which requires no additional training and minimal prompt-tuning, shows substantial improvement over existing methods, and our analysis reveals the importance of perspective-taking to Theory-of-Mind capabilities. Our findings suggest perspective-taking as a promising direction for future research into improving LLMs' ToM capabilities.

Controllable summarization allows users to generate customized summaries with specified attributes. However, due to the lack of designated annotations of controlled summaries, existing works have to craft pseudo datasets by adapting generic summarization benchmarks. Furthermore, most research focuses on controlling single attributes individually (e.g., a short summary or a highly abstractive summary) rather than controlling a mix of attributes together (e.g., a short and highly abstractive summary). In this paper, we propose MACSum, the first human-annotated summarization dataset for controlling mixed attributes. It contains source texts from two domains, news articles and dialogues, with human-annotated summaries controlled by five designed attributes (Length, Extractiveness, Specificity, Topic, and Speaker). We propose two simple and effective parameter-efficient approaches for the new task of mixed controllable summarization based on hard prompt tuning and soft prefix tuning. Results and analysis demonstrate that hard prompt models yield the best performance on all metrics and human evaluations. However, mixed-attribute control is still challenging for summarization tasks. Our dataset and code are available at https://github.com/psunlpgroup/MACSum.

In the 1980s, there was no better place than Bulgaria for virus lovers. The socialist country – plagued by hyperinflation, crumbling infrastructure, food and petrol rationing, daily blackouts and packs of wild dogs in its streets – had become one of the hottest hi-tech zones on the planet. Legions of young Bulgarian programmers were tinkering on their pirated IBM PC clones, pumping out computer viruses that managed to travel to the gleaming and prosperous west. In 1989, an article appeared in Bulgaria's leading computer magazine saying the media's treatment of computer viruses was sensationalist and inaccurate. The article, in the January issue of Bulgaria's Computer for You magazine, titled The Truth About Computer Viruses, was written by Vesselin Bontchev, a 29-year-old researcher at the Institute of Industrial Cybernetics and Robotics at the Bulgarian Academy of Sciences in Sofia. Fear of computer viruses, Bontchev wrote, was turning into "mass psychosis". Any competent programmer, Bontchev claimed, could tell when files are corrupted by a virus. Infected files are bigger than uninfected files. They do strange things, such as play tunes, draw Christmas trees on the screen and reboot computers. It was hard to miss a virus! Prevention through basic cyber hygiene was simple: "Do not allow other people to use your computer; do not use suspicious software products; do not use software products acquired illegally."